maths
posted by joshi kratika .
Give reasons
1) Every parallelogram is not a rectangle.
2) Every rhombus is not square.
3)It is possible to have exterior angle of a regular polygon as 40 degree.
4) It is not possible to have interior angle of regular polygon as 145 degree.

1) The angles of a parallelogram do not have to be right angles.
2) The angles of a rhombus do not have to be right angles.
3) For a regular polygon, the exterior angle must be evenly divisible into 360. In this case it is, and you have a ninesided figure.
4) The supplement of 145 is 35 degrees. That would have to the the exterior angle. It is not evenly divisible into 360 degrees, and so 145 cannot be the interior angle of a regular polygon.
Respond to this Question
Similar Questions

mathfast help please
Find the interior and exterior angle measurements of a polygon with this many sides: x=2y help? 
geometry theorems
I have six questions which will be on a test two weeks from now, and I do not understand. Help me find out these theorems for the blanks. 1. If one pair of consecutive sides of a parallelogram are congruent, then the parallelogram … 
Geometry
1. How many sides does a regular polygon have if one exterior angle is 90 degrees? 
math
can someone please answer these questions for me? 
geometry
Hello, Can some one check my work. I just want to make sure I answered the questions correctly. Thanks, Nikki 1) Every rhombus is a parallelogram. True 2) Every parallelogram is a rectangle. False 3) Every rectangle is a square. False … 
maths
each interior angle of a regular polygon is 18 degree more than eight times an exterior angle. the number os sides of polygon is. 
geometry
If the ratio of the interior angle to the exterior angle is 5:1 for a regular polygon, find a. the size of each exterior angle b. the number of sides of the polygon c. the sum of the interior angles d. Name the polygon 
Maths
In a regular polygon,each interior angle doubles its corresponding exterior angle,find the number of side of the polygon? 
Math
Here are 5 questions I cannot figure out 1. Is every parallelogram a square? 
Maths
A regular polygon has an interior angle which less than ten times its exterior angle by 84°.Find the sum of all its interior angle?